Curated OER
Wikipedia: National Historic Landmarks in Alabama: Sloss Blast Furnaces
Built from 1881 to 1882, this is the oldest remaining blast furnace in the state. Its NHL designation represents Alabama's early 20th-century preeminence in the production of pig iron and cast iron, an example of a post-Civil War effort...
Royal Society of Chemistry
Royal Society of Chemistry: Gridlocks: Level 2
A collection of grid puzzles that cover a wide variety of topics in intermediate high school chemistry. These are excellent for topic review and reinforcement. The puzzles can be played online and also downloaded as worksheets. Answers...
Curated OER
Unesco: United Kingdom: Ironbridge Gorge
Ironbridge is known throughout the world as the symbol of the Industrial Revolution. It contains all the elements of progress that contributed to the rapid development of this industrial region in the 18th century, from the mines...